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EEL 4242 POWER ELECTRONICS

EEL 4242 POWER ELECTRONICS . DIODE RECTIFIERS . Single-Phase Half-wave Rectifier . Figure 3.1 . Input Waveforms . Figure 3.2 . Half-wave Rectifier with RL Load . Figure 3.3 . Full-Wave Rectifier (center-tapped) . Figure 3.5 . Full-Wave Bridge Rectifier . Figure 3.6 .

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EEL 4242 POWER ELECTRONICS

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  1. EEL 4242POWER ELECTRONICS DIODE RECTIFIERS

  2. Single-Phase Half-wave Rectifier Figure 3.1

  3. Input Waveforms Figure 3.2

  4. Half-wave Rectifier with RL Load Figure 3.3

  5. Full-Wave Rectifier (center-tapped) Figure 3.5

  6. Full-Wave Bridge Rectifier Figure 3.6

  7. Bridge Rectifier (motor load) Figure 3.7

  8. Bridge Rectifier (RL load) Figure 3.8

  9. Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0

  10. Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0

  11. Boundary of continuous and discontinuous (single-phase) Figure 3.9

  12. Multiphase Rectifiers Figure 3.12

  13. Three-Phase Bridge Rectifier Figure 3.13

  14. Waveforms and Conduction Times Figure 3.14

  15. 3-Phase Bridge Rectifier (RL Load) Figure 3.15

  16. Three-Phase Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0

  17. Three-Phase Bridge (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0

  18. Boundary of continuous and discontinuous (three-phase) Figure 3.16

  19. DC Filters Figure 3.18

  20. AC Filters Figure 3.19

  21. Single-Phase Rectifier with C-Filter Figure 3.22

  22. Single-Phase Rectifier with C-Filter Figure 3.22

  23. Output Voltage with C-Filter Figure 3.26

  24. Effects of Source Inductances Figure 3.27

  25. Summary • Diode rectifiers convert an ac voltage to a dc voltage. • The output voltage contain ripples which can be removed by filters. • Depending on time constant of the load, the load current may be discontinuous. • Line inductances cause overlap and reduce the effective dc output voltage. • What was the major idea? • What was the muddiest idea?

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